Dipper tooth



July 21, 1931. 0, w, ANDERSEN 1,815,819

DIPPER TOOTH Filed June 14, 1928 20% 2f 4 w 2 7 H g4 Z5 j Y n.:,Tofprovidesecnringmeans comprising pins* which shall jloe.;highlyfVeective v-ftorresist the i Y Patented'Julyl,

OSCAR w. ANDnnsEmorgoAK renmgirrmois, AssIGNoR To 4rrirrcmsoivr:MULLIKEN L coMPA-NY,:orforiioaeo,.ILLiNoIs, A coRroRATIoN or NEW YORK"Darren, TOOTH y pplicationfled Jne f1.4, i .f Myiinvention. relatestoVr teeth .for Clippers such as are .used for f excavating, dredging,,y transferring loose: material or for vother similar work, andr to thejmea-ns orsecuring such teeth-in place on the dipper.v

Y :Certain of my-,objects t invC devising my lprov-ements.are asfollows: Y Y

'17o-provide ia-constructi nfof clipper tooth which lshall be X of`exceedingly light weightversa'l lthereot onfthe f dipper as 'wearthereof Jprogresses, with jthedisadvantageresulting from the continuedAiseota partly,worn,

blnntftooth-ofglowoperating ,efficiency`- l5 VTo provide aconstrnetionof tooth which will-befofrsuchjforni that-*thefmetalthereofl is disposed:practicallyonly@where wear occurs,

5 `sothatwliengthetoothis-wornont ,arelatively o smallgbo'dyonlyjofmetalremaina 7there-hy Y 120.

greatly minimizinggwaste.

Y Curing means Vtherefor rwhichnshall be inex-y pensiveoffrmaniifactnreiascompared-with 'the expensive locking means ias:commonly proremoval, reversa-l and -reattachment of the" same tothedippersjjf Q y *,{lyofprovide esimple and inefipensive'fmeansforffsecuring'fthe tooth nA place 'f without re`quiringitheraido-afwrench i jzTo providesecring-meansifor'/thejtooth?'which may he' readily appliedto positionl and withoutfinterferenoe fromadj aeent Iteeth as Y, in .thecaseofineansfwhichiare insertilole yfromythf-.Sidcsof@the teeth. 'l l A shearingstressesftogwhichtheyaresubiected f in digging, -the pins yto this end being so ,disi `4Q :Lposed r-as Ato l,resist shear :intra direction `longi- ,gwill :be ,ofsubstantially uniform-secti on,

'Y which schghly :Cnducivfto the-makingnf g f perfectcastings, even whenannealedas in the islpreferably inclined i downwardly lronnthe n rcase,otc'astings .of gmanganesefsteel. AT` ideaconstrl y'onvoftooth the snrof the arrow; and f 'llogprovide fa', constructiyonf of *tooth yand'seterial is to yb eremoved, the (ilipperbeing'car-v vided andl involvingrelatively ;great' cost, in A dipper are subjected, in digging,toqforces tudinally of fthefpins, instead Tof" crosswfisea' l thereof asIis commonly ,the .fcase,{with the manifest advantage Y flo provide 'a'constructionof :tooth which'ff y'thereof in which positiony theyaresecured,

ditioning it for attachment' andmse i-onea dipper, shall ybe readilyaccessible'for-:such 'f y l operation thereon, and otherobjects as'willbe manifest from the ollowingdescription, Referring to the :accompanyingdrawings 'f c `flligurelisa View inelevationy oa-portion v ofexcavatingfapparatus comprising a Clipper embodying-*my invention, -.the dipper4being shownas associated with'a fbank O15-material against vwhich it isoperating. a

' Figure Qisanenlarged view ofthe ,upper edgeof the dipper 'frontshowing it'equippQed withmyimproved tooth. l f' VFigure 3 isa sectionalviewtakenatthe line 3.on` Fig. 12 and viewedinthe direction Figure 4,, a"broken sectional tview*,taken'jat the line Llon FigVS and ,viewedfinthe direc-r tion of ythe;arrow. e f i' kIn .Fig jl, Iha'veillustratedthe relation borne by the flipper, represented -at.5,` to a'bank, represented at, from Whichthe'maried byjaiboom .i7 and connectedwith-elevatlng means 8in accordan'ceewith common pracv tice, thearrangement of the'parts being such ythat the'teeth (onejon'ly'of whichisy shown at 9)@carried1by the front -section A10-:ofthey tending totiltthem on their support 5to 1the left in/Fig. lwhich exerts shearing'stresses y at thelconnection betweenfthetoothand vits l support, andgitAistherefore necessary to fprovide securing meansfor the toothfsodisposedk 8817* l as j to adequately resist these yshearing stresses. fIn the yparticular Villustrated embodiment` of my invention, the bases,one only ofxwhich/ Vis-,shown at 11 and ormingseats for the 90;

teleth, are yo1 a common form except at :their u upper. seat-'formingportions, these bases,-rv loef"k ing ormedfseparate from the'front-,section l0 ofthe dipper and overlappingthe lip ilO as bythefastening devices representedat w12. The upper terminal -surfaceof thehaseil'l;y

rear `of thexbase toward Lits Afront i side and surface being recessedat opposite lateral sides, as represented at 14 thereby presenting arib`15, with the bases of these recesses grooved at opposite sides ofthe rib 15, as

represented at 16, andthe lateral faces of the f rib grooved asrepresented at 17, the bases of the recesses 14 and the grooves 17 being'sub-V stantially parallel with the above-referred-to inclined terminalface of the base.

yThetooth 9 tapers'at its upper endl to form a cutting edge portionrepresented at 18, its lower end portion, at which it connects with thebase 11 inclining downwardly .and forwardly at substantially. the sameangle to its front face as in the case of the terminal upper `surfaceofthe base 11, as illustrated, this inclined lower Vface of the toothcontaining a Y groove 19 at which the toothvstraddles the rib 15 of thebase.

The side portions of the tooth and represented at 20' extend, at theirlower portions representedat 21, into the grooves 16, the tooth 9preferably seating against the base at inclined surfaces 22 on theportions Y20 and bearing against similarly inclined surfaces 23 on theinner surfaces of theouter walls of the grooves 17 whereby as the tooth9 is 'drawn downwardly into tight engage# ment with the base-11, ashereinafter described,the tooth will become tightly ywedged inthe.grooves 17 vand held therein against lateral displacement. Y

` The inner lsurfaces of the side portions 2O 'ofthe tooth containgrooves 24 which extend parallel with anddirectly oppose the'grooves 17,these complementary vrgrooves being pro. videdftoreceive wedging pins 25which, upon;

being introducedinto these grooves by insert-y ing the smaller-.end ofthe pinsinto the upper portionsof the grooves and driving them to'.place, force the tooth 9 into clamping engage? lment with the walls ofthe grooves 16 and form an eEective interloclrrbetween the toothvonthe'latter. v.

, As shown in Figs; 3 and 4 the tooth 9 is and the'base for holding thetooth in position cored out as represented at 26 toforni a sockettherein, whereby the tooth is caused tov vbe of' substantially uniformsection throughout its extent which, as above stated,

is desirable not only in connection with'the molding of the tooth,especially when made thereof.A

A The cored yond'the rib Vof'nianganese steel,fbut also in the annealingsented at 2.7 and 28, to' receive, and interfit with, the portions 29and30, respectively, of Y the tooth. f

It vwillfbe understood from the foregoing,

that Vby positioning the locking pins in Vaccordance with my, inventionthe shearing stresses are exerted laterally against the pins along'planes coincident with the longitudinal portion26A extends upwardlybeportion of the base the latter being notched at' its opposite ends, asrepre axes of the pins rather than against a comparatively Vsmalltransverse area thereof,

-sueh bases `are provided they would be arranged in spaced relationalong thevlip portion of the dipper front) my improvements may beincorporated inadipper in which the bases are formed integrally withythe dipper front. u Furthermore, by the references in the speciticationandthe appendedclaims to a'tooth, I vdo not wish tobe understood asintending to limit the invention to a one-piece tooth as itis equallyapplicable-to a so-called tooth having a separate tip' constructed, andse-V cured to the base portion of the'tooth, aci-j cordance with myinvention.

What'l claim as new, and desire to secure by 'Letters Patent, is Y Y 1.A dipper having a front portion centaining grooves presenting surfacesinclining downwardly toward the frontsurface of said front portion, atooth onsaid'front por'- tion having surfaces which inclineVdownwardly'toward thefront surface ofsaid front portion and at whichsurfaces said toothbearsr against's'aid'surfaces of said grooves to forman interlock resisting lateral'displacement of said tooth, and meansfor' securing said tooth to'l said front portion comprisinga pin` exV stending between a portion Vof said tooth Yand l said frontportionbetween said grooves and interlocking therewith and so ldisposed thatthe shearing stressesexertedagainst the'pin, in digging, are in adirection lengthwise of the pin.

2. A V.dipper taining vgrooves presenting surfacesfinclining downwardlytoward the front surface of said front portion, a tooth on said frontlportion having surfaces which incline f downwardly having a :frontportiony con# toward the front surface of said front section l and atwhich surfaces -said tooth bears againstsaid surfaces of saidgroovestoform an interlock resisting lateral displacement of said tooth,and ymeans for securings'aid tooth to said front portion comprising apin exteiidwV ing between a portion'o'f said tooth and saidY frontportion between said grooves and interlocking therewith and incliningdownwardly V toward the front surfaceo'fsaid front section.

3. A dipper ,having-:a front portion presenting a rib with grooves insaid front portion at opposite sidesof said rib',adjacent the iisissie sbase o f the latter,atooth containing a groove at which it straddlesisaid rib, 'rear portions Vof said tooth extendingfintosaid grooves insaid front portion, and-means' for securing said tooth to said frontportion at said Vrib comprising pins located between said rib, 'atopposite sides thereof, andthe side portions of'said tooth andinteilockedwith said toothkr and rib and inclining downwardly toward thecomprising pins interlockedwith said'tooth and said front portionbetween said grooves,

said pins being so disposedthat the shearing stressesexerted against thepins, in digging, are ina directionr lengthwiseof the pins.

5. A dipper having a front portion, a tooth thereon, and means forsecuring said tooth to rsaid front portionfcomprising a pin interlockedwith said front portion and tooth and y so disposed that the shearingstresses exerted securing 'said toothto said frontlportion at said ribcomprising. 'a' pin located n between said rib and a side of said tooth,and interlengthwise of thevpin, the vlongitudinal axis of the pininclining relative to la plane bisect-l ing thetooth downwardly'toward'the front face of the tooth and substantiallyparallel with the plane inwhich the terminal rfaceof` the tooth extends following wear thereof. f

16. A dippery havinga Vfront portion .pre-y senting arib with grooves insaidfront por-` .tion atV opposite sides ,of saidfrib adjacentlj e jtheVbase of the latter, a-tooth containing a 1 groove at which it straddlessaid rib, rear por*L tions 'of 'said tooth g extending into vsaidgrooves in said front portion, and means for locked with said toothandfront yportion and so vdisposed that the shearing., stresses exertedv against the pin, in digging, are in a direction "lengthwise of thepin, c c s f A dipper'having a front portion con-v taining-grooves, atooth on said front portionV and having'portions atits rear extendinginto ysaid grooves to form anfinterlock resisting lateral displacementof said tooth, and means for securing said toothito said front portioncomprising a pininterlocked-with said tooth i and said front portionvbetween said grooves, said pinbeing'so disposedthat-the shearingstresses exerted'againstl the pin, in digging,

are in a direction lengthwise of the ',pin.

`8. A' dipper having a front portion pie-y senting a rib withgroovesinsaid fiont portion vat opposite sides of said rib Vadjacent the baseofthe latte`r,atooth containing a groove at which Vit straddles said rib,rear portions of said toothextending into said grooves in v saidjfrontportion,andkmeans for ysecuring of the pin.A f

said to'otlixrto y'said' 4front portion 1 at jsaid i rib comprising apin'located between said rib and a side vportion'of said tooth andinterlocked` vwithsaid tooth and rib and sodisposed'that g' f theshearing stresses exerted yagainst the pin, i' yin digging, are in a-direction klengthwise'of the pin.'

i 9. A'dipper having a front portion con'- taining'grooves, a'tooth onsaid front portion ,extending into said grooves to form-an interlockresisting lateral displacement of. said tooth, and means for securingsaid tooth to said front, portion comprising a pin extending infront ofsaid grooves between a portion of said tooth and said front portion andinterlocked therewith and so disposed that'the shearing stresses exertedagainst the n tends into said socket and between upper and againstthepin, in digging,are iii a direction lower walls 'of said socket tointerlock said tooth withl said front portionthe upper and lower wallsof said socket reaching short of the groove in said tooth, and a pinextending yinto 'said opposed grooves and interlocking said tooth withsaidffront portion and so disposed that theshearing stresses exerted.

against the pin, in digging, are a direction lengthwise of the pin.

l 11. A dipper having a front portion and a tooth portion, one of saidportions containing a 'groove into which the other of said portionsextends, said groove being open at its, opposite ends, ymeans forsecuringV said tooth` portion to said front portion comprising a pinlocated between, and interlocked` with, said portions lat said'groove,and means for x preventing 'displacement of said tooth portion on saidfront portion in the direction ofthe length ofsaid pin toward either endthereof.

12. A dipper having a front portion and a tooth portion, one of saidportions containing a groove into which the other of said porl tionsextends, said groove being open at its opposite ends, and means forsecuring said' .A tooth portion to said rfront portion comprisf ing alpin located between, and interlocked with, said portions at said groove,the one of said portions containing said groovecontaining a socketbeyond said groove and the other of said portions having a projectingportion which extends into said socket for preventing displacement ofsaid tooth portion'on said front portion in the direction of y thelength yof said pin. c i

y `13. A dipper having a front portion and a tooth portion, said toothportion. containing a groove into which said front portion extends, saidgroove being open at its opposite a front portion, al

ends', and means or'seouring said tooth portion to'eaid front portioncomprising L pin n located between, and interloeked With, said portionsat said groove, Said toothportion Y containing a socket beyond saidgroove and said front portion having ai. projecting por'- tion whichextends into said socket for pre- Venting displacement of Said toothportion on .said front portion in the direction of the pin.

length ofpsaid r OSCAR W. ANDERSEN.

